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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '093b048b393fac4a94d960258f63d9bfda5c2adca4690f80103522e1176e6056' 
  AND token = 'LS8lxsmygZJg8I2olfGiziLQnDoyBpmhUsiHO6Tjxx8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}